Type group and type selecting means for wheel printers



I Feb. 19, 1957 APGAR 2,781,722

TYPE GROUP AND TYPE SELECTING MEANS FOR WHEEL PRINTERS 3 Sheets-Sheet 1Filed May 4. 1955 L- INVENTOR.

DONALD H. APGAR ATTORNEY Feb. 19, 1957 D. H. APGAR TYPE GROUP AND TYPESELECTING MEANS FOR WHEEL PRINTERS 3 Sheets-Sheet 2 Filed May 4, 1955DONALD H. APGAR ATTORNEY D. H. APGAR Feb. 19, 1957 TYPE GROUP AND TYPESELECTING MEANS FOR WHEEL PRINTERS Filed May 4, 1955 3 Sheets-Sheet 3240 51F200 mzoN INVENTOR.

DONALD H APGAR ATTORNEY t 246 wziokmwm printing wheel.

United States Patent TYPE GROUP ,AND TYPE SELECTING MEANS FOR WHEELPRINTERS Donald H. Apgar, Binghamton, N. Y., assignor to InternationalBusiness Machines Corporation, New York, N. Y., acorporation 'of'NewYork Application May 4, 1955, Serial No.;5,05,866

6 Claims. (Cl. 10193) This invention relates to wheel printingmechanisms in general and more particularly to the type wherein positionto unlatch alower pull rodwhich controls the type group selecting clutchto initiate rotation of the Thefour analyzer slides are under control offour analyzer cams which have such formations that the lower pull'rod isonly 1unlatched at a delayed time in the cycle. This delay in engagementof the type group selecting clutch occurs for single holes 9-1 andcombinational holes'8-4, 8-3.

Itis evident by recourse tothis patent that the above described analyzerstorage mechanism 'is a complicated structure although it serves itspurpose well from the view-point of elficiency and operation. I

It is then the main object of-the invention to provide a type groupselecting mechanism which is simpler than that heretofore devised,andoperates as efiiciently. The simplification not only reduces the costof manufacture but cost in the'reguirement for service and adjustmentwhen needed.

According to the present invention a clutch release arm for a singlerevolution delay clutch-isengaged at differential times as aresu'lt ofthe energization of a print control magnet in accordance with the holes9-1 and said delay clutch is provided with a cam disk-having a camportion effective as the clutch terminates its rotation and in delayedpoints in the cycleto actuate a clutch release arm of the type groupprinting wheel clutch to select groups of type associated with theholes9--1.

Another object, according to the invention,,is to devise such cam diskwith two other cam portions which, as

a result of an. engagement of. the delay clutch when, an

8 holeis analyzed, causes'the clutch release armvto be actuated ateither the a or 4 card hole impulse time to therebycause the type groupselecting clutch to select type groups allocated to 8-3 or.8-4combinational holes.

This'arrangement. is especially useful in printing mechanisms of thetype shownin the patent Wh6Ifei8-30l 8 4 combinational holes' selecttwo. extra groups of 0, X, R holes are analyzed. to select a group oftype ,allocatedtoeonly t), .X, R holes, :and to prevent the p The fouranalyzer slides are adapted when in a, certain Patented Feb. 19, 1957control magnet from operating the delay clutch when 9-1 holes areanalyzed. j

Astill further object is to devise the above described construction insuch manner that it is capable of being incorporated in commercial 407Accounting Machines marketed by thelnternational Business MachinesCorporation and shown in the aforesaidU. S. Patent No.

2,438,071, without changes in the timing of the machine.

A still further object is to provide an interlock in the form'of-a camwhich-prevents the actuation of said clutch release armfor said delayclutch when 0, X, R' holes are being analyzed, andto release said clutchrelease arm for actuation by said print control magnet upon itsenergization by the 9-1 holes.

Other objects of the invention will be pointed out in I the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawings:

Figs. la and 1b when assembled in this order comprise a transversesectional view through the machine showing the construction of theimproved alpha-numeric punctuation and symbol printing mechanism.

Fig. 2 is a diagram showing in the outer circle the type on the printingwheel as they .are arranged in' groups, the next inner circle showingthe particular 0, X, Rzone holes or N pulse which select the type ineach group, andthe innermost circlethe particular card holes whicheither singly or in combination select the groups er type.

, Fig. 13 is a timing diagram of.the machine.

The present improvements are directed to a simplification of the meansfor selecting a group .oftype and a desired type in a' selectedgroupdisclosed in the patent to R. E. Page et al. No. 2,438,071.

As shown inthis patent,.and herein the type wheel 45 (see Fig. 2)carrying 48 type is provided withall of ,thedigit type 09,.a completeset of alphabetic characters,

and a series of punctuation characters and symbols. Each group of typeconsists of fourtype, grouped as diagrammatically shown in Fig. 2. 7

' scribed, if; anumeral type is to be selected forprinting,

the printingimpression will be taken at the N point in the machinecycle, which point is after the R index point position (see .Fig. 3 fortiming of the N impulse).

The alphabet type of the selected group are selected by the 0, X and Rzone holes. For example, ifvthe hole should be at the 2position and nozone hole is present, the digit 2 willbe printed. If a zone hole is atthe 0 index point, such hole will select the type S; if at.the

index point typeKwill be selected, and if at the R index point positiontype .B will be selected.

More specifically, ifthe holeis atthe 2 index point position alone,a'printing wheel 45 (Fig, lb) will be rotatedcounterclockwise until theZffltype is at the fprintingjline, and then the printing wheel 45 willbe rocked asa result of the pulseto effect printing from the 2 type. It,will be noted that if a zone hole is at the R positions,.thenundercontrolof the R zonehole the printing wheel 45 will berocked earlier than for printing the digit 2,,t -o take animprint fromtheB type. The zone hole at the .X position will cause the printingwheel 45 to be rockedstill earlier to take an-imprint from theKtypepandeazonehole at theO, index point positionstillearlier,to;,print,from the S type.

The same principle of operation is provided for selecting the numeraland alphabet type of other groups.

Also as in U. S. Patent No. 2,438,071, there are three groups ofpunctuation and symbol type, one group being selected by combinationalholes 8-3, another by combinational holes 8-4, the particular type ineach group being selected by 0, X, R zone holes, or the N pulse in theabsence of such zone holes.

In the absence of any card holes at 1-9, 8-3, 84, the N pulse alone willselect one punctuation type, and 0, X, R zone holes willselect the othertwo punctuation type, and zone hole alone the 0 numeral type.

As is well known, the card is fed past suitable analyzing mechanism toanalyze the index points in the order 9, 8, 7, 6, 5, 4, 3, 2, l, 0, Xand R. When an analyzing brush senses a hole by circuits shown in U. S.Patent No. 2,438,071 in any of the above index point positions in acolumn, a circuit is closed to a printing control magnet 10 (Fig. 1a),and for each card column there is a printing control magnet 10.

When a magnet 10 is energized it attracts its related armature 11against the force of a return spring 12 so that a lug 13 at theextremity of armature 11 is removed from a shoulder 14 of a related link16 which is suitably guided for a reciprocating movement. When the link16 is unlatched by removal of lug 13 from shoulder 14 a compressionspring 15 fitting in a spring support and guide block for link 16 urgeslink 16 to the left, and when such spring 15 is effective for actionunder control of a cam 17, it serves at times as a source of amechanical impulse transmitted to link 16 to rock a clutch release arm59, 60, 61 to cause type group selection.

Pivoted on a rod 18 is a follower arm 19 having its rounded end receivedby a semi-circular notch 20 in a related link 16, said follower arm 19thus being connected to link 16 is also urged by spring 15 to cooperatewith cam 17. Said cam 17 is provided with a series of notches 17a, onefor each index point analyzed and also for the N pulse. Said notches 17aare each registered with the follower extension 22 of follower arm 19shortly after the index points on the card are analyzed. Thereupon,spring 15 is effective, if magnet 10 is energized, to cause projection22 of arm 19 to enter a notch 17a, rock arm 19 counterclockwise to shiftrod 16 to the left to rock the clutch release arm 59, 60, 61 to engage adelay clutch in a manner to be presently described. Thereafter, inclinedportion 17b of each notch cams follower arm 19 and pull rod 16 to theright to enable the pull rod 16 to be relatched by the now restoredarmature 11 of the deenergized magnet 10. Said cam 17 is, with theexception of its timing and formation of notches, substantially likeearn 125 of Patent No. 2,438,071. In said patent thetiming of cam 125enables it to function as a delay cam, whereas in the presentarrangement it is timed to be effective on the pull rod 16 substantiallysynchronously with the card impulses transmitted to magnet 10. Cam'17 issimilarly driven by a shaft 153, as in said patented machine.

Diverting for the present to the construction of the printing mechanismthere is also provided in the present machine a shaft 29 (Fig. 1b) whichis fluted transversely around its periphery to provide clutch notches30. Shaft 29 carries a plurality of gears 31, there being one gear 31for each order of the. printing mechanism; the series of gears 31loosely encircling the periphery of the drive shaft 29. To provide forthenecessary lateral spacing between the gears 31 the gears are guidedby guide slots 32 formed in guide bars 33 and 34. By such spacingmembers the gears 31 are separated to allow independentrotation and toalso locate a clutch pawl 36 which is pivoted by a stud 37 on therelated gear 31 to cooperate with a related clutch release arm 40pivoted on a rod 41. The clutch release arm 40 normally holds the clutchpawl 36 in such position that its tooth 42 is held out of engagementwith any of the clutch notches of the shaft 29. When the clutchrelease-arm is rocked counterclockwise at a difierential time, as theresult of its operation by the delay clutch, the type group selectingclutch is engaged because a spring 44 attached to clutch pawl 36 willrock the latter to cause the clutch toot-h 42 to engage a particularclutch notch 30 determined by the differential time the clutch releasearm 40 is operated by the delay clutch. The above described clutch isthe type group selecting clutch and causes the difierential rotation ofthe printing wheel 45 since the gear 31 and printing type of theassociated type carrying wheel 45 are intergeared.

Each printing wheel 45 is carried by an arm 46 loosely pivoted on a rod43 which is provided with a follower extension 47 which is engaged by acam projection 48 of a cam disk 49 which is the print cam andconstitutes a driven member of a printing clutch.

Pigs. in and lb show the arrangement of the printing devices for asingle order and the machine is preferably provided with duplicatedevices for printing a plurality of printing characters.

The construction and operation of the delay clutch which constitutespart of the present invention to select groups of type in accordancewith the index point posi' tions 9-l analyzed will now be described.

The delay clutches, of which there is also one for each order, aredriven by a reamer shaft 50 which is slotted transversely to provide aseries of clutch notches 51. Encircling the periphery of the shaft 50 isa cam disk 52, there being one cam disk for each printing order. Toprovide for the lateral spacing between the plurality of cam disks andthe parts carried thereby said cam disks ,52 are guided by fitting inslots 53 formed in a plurality of comb guide blocks 54. By such spacingthe cam disks 52 are separated to allow independent rotation and to alsolocate a clutch pawl 55 which is pivoted on a stud 56 on the cam disk sothat its extremity is in the plane of and normally engaged by a hookportion 57 of a triple arm clutch release member consisting of arms 59,60 and 61. The clutch pawl 55 is provided with a clutch tooth 63 adaptedto engage one of the clutch notches 51 dependent upon the time that thedelay clutch is engaged and corresponding to the time that the firstimpulse is directed to the print control magnet 10. The pull rod 16 isprovided with a depending shoulder 65 abutting the upper end of the arm59, it being obvious that when the pull rod 16 is moved to the left as aresult of the unlatching by armature 11 of an energized magnet 10 andthe position of cam 17 as previously described, the movement of theshoulder65 away from the arm 59 will enable aspring 66 to rock thetriple arm clutch release member ,59, 60, 61 counterclockwise so thatthe hook 57 of the arm 60 will be disengaged from the clutch pawl 55. Aclutch pawl operating spring 63 will then be effective to rock theclutch pawl 55 to engage the clutch tooth 63 with one of the notches 51,the par ticular one which is'engaged being dependent upon the time thatthe magnet 10 is energized (see Fig. 3). The timing conditions anddelays in each clutch engagement are such that a digit impulse willcause the engagement of the clutch just prior to the time of thesuceeding card impulse. Reamer shaft 50 may be driven by the operatingmechanism shown in the Page Patent No. 2,438,071 by any suitable geardrive mechanism so that it rotates two revolutions per cycleandsynchronously with the other operating parts of the machine.

Each cam disk 52 is provided with a cam" edge 70 (Fig. 1a) which, in theclockwise rotation of cam disk 52, is sufficiently high to strike afollower roller 71 of a follower arm 72 pivoted on a stud 73 and rocksaid follower arm. During 90 rotation of a cam disk 52 (see Fig. 3),roller 71 will rest against a concentric high portion 75 of the camdisk, after which time roller 71 will drop to a slightly lowerconcentric portion 76 being urged to do so by a spring 77 acting uponthe follower arm 72. At this time a projection 80 of the follower arm 72will engage a shoulderfil of atriple arm member 82 to-hold the'followerarm 72 against'further clockwisemovement. For the present member 82 maybe regarded as a-stop to hold follower arm 72 from being rockedclockwise any further, due to still lower cam portions'105 and 109 whichare presented to the roller 71 in the'further clockwiserotationofcamdisk S2. Cam edge 70 will ultimately engage the roller 71of the follower arm 72, rocking it counterclockwise against the actionof the spring 77. In this counterclockwise movement a foot 83 offollower arm 72 will actagainst a cam edge 84 of an extension of clutchrelease arm 40, thereby rocking the clutch release arm-40counterclockwise to disengage it from the clutch pawl 36 of the typegroup selecting clutch. This causes an engagement of thetype groupselecting clutch and the initiation of rotation of printing wheel toselect a desired group of type.

The time that the printing wheel clutch is engaged in the manner justdescribed is dependent uponthe time that the delay clutch is engagedandthus the time the magto the 8 card hole impulse so that clutch tooth63 will engage the 9 notch 51 of clutch drive shaft 50. The cam disk 52will then be rotated clockwise until cam edge 70 striking roller 71rocks clutch release arm 40 to cause the engagement of the type groupselecting clutchat about 138 of the operating cycle. type groupselecting clutch at this timewill cause printing wheel 45 to rotatecounterclockwise exactly as. in Patent No. 2,438,071 the extent of tengroups of typeto successively'present the characters 2, 11, I and 9 ofthe group selected by the 9 hole '(see Fig. 2) to the printing linebetween 300-'345. The differential time that cam disk 52 causes theengagement of the type group selecting clutch determines the extent ofcounterclockwise rotation of the printing wheel 45 to select a-group oftype for printing between 300-345. mined extent of rotation oftheprinting wheel 45 has beeneifected and after the printing impressionhas been made, with the type group selecting clutch still engaged, theprinting wheel 45 will continue to rotate until the end of the clutchpawl 36 (Fig. 112;), strikes clutch arm h"; which, in the meantime,hasbeen brought s norrnar' position by means of a compression spring J.When such disengagement is effected the printing wheel 45 is inthenormal position shown in Fig. 1b and diagrammatically in Fig. 2. In thesame manner, after the cam disk 532 has rocked clutch release arm 40, itwill continue to rotate clockwise .until the free end of the clutch pawl55 engages the'hook 57 of the arm '60 to disengage the clutch tooth 63from the notch 51 it engaged. When such disengagement iseifected thedelay clutch will be in the normal position shown inFig. 10.

manner the-extent of counterclockwise rotation offthe.

Engagement of the After the predeterprinting wheel is still furtherdecreased to the extent of proportionally lesser groups-of type when thecard holes 7, 6, 5, 4, 3, 2 and l are analyzed becauseof the later timesthatthe delay clutch is engaged. -Howeve'r in eachflinstance after thetype of selected group are presaid printing wheelto bebroughtbackto thenormal-posi- :6 tion-shownin Figs. 1b and'4, at the end of the operatingcycle.

From whatrhas been described and is evident in Fig. 2 the digit holes9-1 select the, desired group of nine diiferent groups of types, eachconsisting of four type. The ,particularpalphabet type in theselectedgroup from which printing is to beeflected is selected by the 0, X and Rzone holes and in the absence thereof the transmission of an N:impulseto print from the numeral type. Thus, thetime in the machine cycle thatactual printing occurs, is fixed according to zones. The sens.- ing of a0 zone'hole will cause printing at 300 in the cycle; a hole at X willcause printing at 315 and a hole at ',R at 330 andin the absencethereofa-machine impulse at the N time, transmittedby circuits shown in PatentNo. 2,438,071 willeiiectprintingat 345 from the numeral type of theselected group. Each of these pulsesconsists of a second impulsetransmitted to the magnet 10 and by mechanism which is substantially,the same as in the U. SuPatent No. 2,438,071the print clutch is engagedat a-dilferential time to rock the printing wheel 45 to print from theselected type. For this reason this mechanism will only begenerallydescribed herein.

The second energization vof the magnet 10 upon analysis of the O, X,Rholes or the transmissionof the N impulse attracts its armature 11 tounlatch. the link 16 in the-mannerpreviously described and under controlof. the notches 17a in cam 17 designated 0, X, R and N1 .said link 16 ismoved to the left by the action of spring 15. At the upper extremity oflink 16 there is provided an upturned finger 85. (,Fig. .la) engaging :1depending ex-tensioni86 of an arm.'87. .As a result of'this secondmovement of link 16 arm 87 is rocked clockwiseto register a notch 126vtherein with a depending extension 127 of the clutch release .arrn88.'The latter is now rocked by a spring 189 to nnlatch. a clutchpawl 90.At

this time .a ,low; portionc of.;a cam 120 (similar to cam 137 of PatentNo. 2,438,071) cooperate with cam 'followerextension'121 so as not torestrain the rocking of the clutch'release arm 88.

projection 48 will strike the extension 47 of the arm 45 on which ispivoted'the'printing wheel 45 and thereby rock said printing wheelagainst the usual platen at the time the selected type is at theprinting line to effect the printingimpression.

It is explained-that shaft, 29 shown in the timing diagram is-sloweddown between300345 by mechanism shown'inPatent No. 2,438,071 which is atthe times that'the cam projection 43 engages extension 47 so that duringsuch slowed-down rotation of the print wheel'45 printing may be effectedfrom theselected type in accordance with thepresence of 0, Xfand R holesor in the absence thereof the N machine impulse.

During the time that the second impulses are transmitted to the magnet10 at 0, X, R and N times the arm 61 cooperates with the highportionltltla of cam 100, holding the triple arm member 59, 60 and 61inthe .normal' position so that hook .53 will notfbe disengaged'flOlIlnIhfi clutch ;pawl 55. .'Hence, .the transmission of Fig. 3.

Selection oftype groups under control of combinational holes 8-4 and 8-3,From the diagramof Big. 2 it willbe seen that there 7 are two groups ofsymbol and punctuation characters selected by the combinational holes8-3 and 84.' The manner in which the delay clutch selects such groups ofcharacters as a result of combinations of impulses will now beexplained.

When a card column is perforated with either the 83 or 8-4 holes the 8impulse which is analyzed first is transmitted to magnet at the 8impulse time to energize said magnet and under control of the notch 17aof cam 17 designated 8 link 16 will move to the left to cause theengagement of the delay clutch precisely in the manner previouslydescribed. This initiation of rotation of cam disk 52 would normallycause the cam edge 70 of cam disk 52 to effect the engagement of thetype group selecting clutch except that a second hole at the 4 or 3position will prevent such normal operation. Assuming now that a cardcolumn has an additional hole at the 4 index point position magnet 10 isagain energized. Cam disk 52 which has been initiated in rotation by the8 hole will present a notch 105 shortly after the 4 impulse to registerwith the cam follower roller 71. The second energization of magnet 10 atthe 4 impulse time will again unlatch link 16 which moves to the leftunder control of the notch 17a of cam 17 designated 4. Removal ofshoulder 65 from arm 59 permits spring 66 to rock the triple arm 59, 60,61 counterclockwise, it being noted that at this time arm 61 is over thelow dwell 10% of cam 100 as is the case for 9-1 impulses. Arm 60 whichis beneath an arm 106 of the stop member 82 rocks said stop member 82clockwise to move shoulder 81 downwardly away from the projection 80 ofthe follower arm 72 to release the follower arm. Spring 77 is nowefiective to rock follower arm 72 clockwise to cause follower roller 72to ride off a cam edge 76 (see Fig. 3) and drop into notch 105.Extension 83 of the follower arm 72 will coact with a cam edge 107 ofthe clutch release arm 40, rocking the latter counterclockwise tounlatch clutch pawl 36 and engage the type group selecting clutch.

From the timing diagram of Fig. 3 it will be seen that the type groupselecting clutch will be engaged at about 105 much earlier in the cyclethan if the 8 hole alone was present in the card column. This earlierengagement of the type group selecting clutch causes the rotation of theprinting wheel 45 to the extent of twelve group of type to present fourdifferent symbols successively to the printing line. After the selectionand printing of the desired type which is determined by the 0, X, R holeor the N impulse in the manner previously described, the printing wheelis rotated complementally back to its normal position shown in Fig. lb.

After the engagement of the type group selecting clutch the cam edgedemarcating notch 105 will engage the follower roller 71 to rock thefollower arm 72 back to normal position where it will be held in thisposition by the normal position of stop member 81. Previously cam edge17b demarcating the 4 notch 17a of restoring cam 17 will relatch link16, rock clutch release arm 59, 60, 61 to normal to permit the stop arm82 to assume its normal position as a result of the action of arestoring spring 108.

Clutch release member 59, 60, 61 now assumes its normal position andhook 57 will be in position to engage the clutch pawl 55 to effect thedisengagement of the delay clutch, thereby bringing all of the partsthereof to the normal position shown in Fig. la.

Upon occurrence of the combinational holes 8-3 the delay clutch will beengaged at the 8 time as previously explained but at the time the second3 impulse is directed to the magnet 10 a second dwell 109 of cam disk 52will be registered with the follower roller 71 so that upon the secondrocking of the triple arm member 59, 60, 61 stop member 82 will berocked to unlatch the follower arm 72 which enters the notch 109. In themanner explained for the 8-4 combinational holes this will cause the en-1 8 gagement of the type group selecting clutch, thereby initiatingrotation of the printing wheel at 120 to cause a lesser rotation of theprinting wheel than for the 84 combination and to the extent of elevengroups of type. This extent of rotation of the printing wheel 45 willselect a group of four punctuation and symbol type. The presence of the0, X or R zone holes in the card column or an N impulse will determinewhich of the four type will be printed from.

Attention is directed to the provision of a foot 110 (Fig. la) on link16 which is in the plane of an extension 111 of arm 72. When link 16moves to the left as a result of projection 22 entering the notch 17adesignated 4, foot 110 abuts, extension 111 to hold arm 72. Cam edge 17bof notch 17a designated 4 then earns link 16 to the right to berelatched and foot 110 is now in the normal position (Fig. la). Thisreleases arm 72 for free movement to enable roller 72 to drop to a lowerportion 76 (see 'Fig. 3) then as cam 52 rotates a little furthercounterclockwise drop further to enter the notch 105.

When combinational holes 8-3 occur in a column the projection 22 entersthe notch 17a designated 3 but foot 110 of link 16 engaging theextension 111 of arm 72 will hold arm 72 .to prevent its roller 71 fromdropping into the notch 105, effective for 8-4 combinational holes.Thus, improper printing of the group of characters selected by 8-4 holesis effectively prevented.

Notch 17b designated 3 is wider than the other notches 17b, as is bestseen in Fig. 3. After cam 52 is rotated counterclockwise to the pointwhere roller 71 is not registered with the notch but rests upon a camedge 112, the restoring cam edge 17]; of notch 17a designated 3 will beeffective to relatch link 16 to move foot away from the extension 111.This releases arm 72 for free movement to enter the notch 109 asrotation of cam disk continues counterclockwise, and as a result ofentering notch 109 the type group selecting clutch is engaged aspreviously described to select the group of type for combinational holes8-3.

Selection of type by zone holes only From the code of Fig. 2 it will beseen that there is a group of symbol and punctuation type which areselected by the transmission of an N impulse in the absence of any ofthe digit impulses 1-9 or 8-3 and 8-4. This N impulse is a machineimpulse (in contradistinction to a card hole impulse) which istransmitted by circuits shown in U. S. Patent No. 2,438,071 at about 187(Fig. 3) when in the present arrangement when arm 61 is riding on thehigh dwell 100:: of cam 100. This obviously prevents rocking of thetriple arm clutch release member 59, 60, 61 and the engagement of thedelay clutch. The transmission of the N machine impulse to a magnet 10will attract its armature 11 to unlatch the link 16. Follower projection22 will then drop to the lower dwell N1 of cam 17 enabling link 16 tomove to the left suflicieutly to cause foot 110 to rest against theextension 111 of arm 72. Thereafter, under control of a still lowerdwell portion N2 of the restoring cam 17 link 16 is moved at about 278in the cycle still further to the left by the action of the spring 15and in this case a sufiicient extent so that said foot 110 of the link16 will rock the follower arm 72, counterclockwise against the action ofits spring 77 and movement of extension '83 of arm 72 against the camedge 84 will rock the clutch release arm 40 counterclockwise, therebycausing engagement of the type group selecting clutch at about 300 inthe machine cycle. This will cause the rotation of the printing wheel 45to present a group of symbol and punctuation type successively to theprinting line. The type in the zone only group were selected by the 0, Xand R holes as previously described, or in their absence by the Nmachine impulse which is precisely as fully described in U. S. PatentNo. 2,438,071.

While there have been shown and described and pointed out thefundamental novel features of the invention, it

eyzsirma will be understood thatva-rious omissions and substitutions andchanges in the 'form;and detailsof-the device illustrated and in itsoperation may be made by those skilled in the art, without. departingfrom .the. spiritofihe invention. It is the-intention, therefore, to belimited only as indicated by the scope ofthe following claims.

What is claimed is: 4

1. In a machine controlled .by records .of the type having holes at oneposition to select a first .group oftype and at another position forselecting-another group of type but includingsaid oneposition,.-a';rotatable,printing wheel carrying said groupsofrtypegmeans for analyzing said records, a clutch wadap-tedupon itsengagement to rotate saidprinting wheelzto select either. of said groupsoftype, means for releasinglsa-id clutch for engagement, a supplementalclutch ,for 'controllingsaid clutch releasing means, a cam disk rotatedby .saidysupplemental clutch, a print control magnet ,for controllingsaid supplemental clutch, means under control ,Of ;said.-analyzing;means v.for transmitting dilferentially timed electrical impulsestoenergize said print control magnet once in accordance with the hole atsaiduone position,:andaa secondtime; forthe hole at the other position,means under control of said print control magnetwhen 'ene-rgized' bysaid one impulse to cause at the time the one impulse istransmitted theengagement of said supplemental clutchand the initiation of the rotationof said cam -disk, mea-ns comprising a cam portion of saiddisk toactuate said clutch releasingmeans at another different time haying adefinite delayed time relationship to the time the supplemental clutchis engaged, to cause said first named clutch to be engaged to effect therotation of said printing wheel to select said first group of type, asupplemental cam portion of said cam disk, and means controlled by saidsupplemental cam portion and said print control magnet when energizedthe second time after the initiation of the rotation of the cam disk tocause the actuation of said clutch releasing means at a still difierenttime having a definite delayed time relationship to the time thesupplemental clutch is engaged to engage said first named clutch toselect said other group of type.

2. In a machine controlled by records of the type having holes atdifferent positions, and positions 0, X, R, a rotatable printing wheelcarrying groups of type; one group of which is selected by one hole, andanother group is selected by said one hole and another hole at adifferent position, impression effecting means for taking an imprintfrom the type on said printing wheel, means for analyzing said records,a clutch adapted upon its engagement to rotate said printing wheel,means for releasing said clutch for engagement, a supplemental clutchfor controlling said clutch releasing means, a cam disk rotated by saidsupplemental clutch, a print control magnet for controlling saidimpression effecting means and said supplemental clutch, means undercontrol of said analyzing means for transmitting electrical impulses toenergize said print control magnet when said analyzing means analyzessaid one hole, said other hole, and holes 0, X, R, means under controlof said print control magnet when energized upon the analysis of saidone hole to cause the engagement of said supplemental clutch and theinitiation of the rotation of said cam disk, means comprising a camportion of said disk to actuate said clutch releasing means to causesaid first named clutch to be engaged to effect the rotation of saidprinting wheel to select said one group of type in accordance with saidone hole, a supplemental cam portion of said cam disk, means controlledby said supplemental cam portion and by said print control magnet whenenergized under control of said other hole for causing'the engagement ofsaid first named clutch to select said other group of type, meanscontrolled by said print control magnet when energized in response tothe impulse upon analysis of the 0, X, R hole to cause the operation ofthe impression effecting means to cause printing from the selected typeof the selected group, and interlock means for preventingthe operationof the last named means when said magnet is energized to cause theengagement of said supplemental clutchand for preventing engagement ofthe supplemental clutch when saidmagnet is energized to cause theoperation'of-the impression effecting means.

3. In a printing machine controlled by records of the type havingholesat dilferentpositions, a rotatable printing wheel carryinggroupsofztype, aplurality of which groups are selected by singleholes,,and another group of type isselected by one of saidholes andanother-hole, means for analyzing said records, a :clutch adapted .uponits engagement torotate saidprinting wheel, meansfor releasing saidclutch forengagemenna supplemental clutch for controlling said :clutchreleasing means, a camdisk rotated by said supplemental clutch, .a printcontrol magnet, 'means under control of said analyzing means forenergizing said'print control magnet 21 first time when one of saidsingle holes is analyzed, and a second time whensaid other hole is:analyzed, -means under control of saidprint:controlmagnet whenenergized a firsttimeto cause the engagement of said'supplemental clutchand initiation ofithe rotation ofsaid cam disk, a first cam portioncarried by said cam disk for actuating the clutch releasing means tocause-engagement of said first named clutch and the rotation of theprinting wheel to.select.a group of type of said plurality of groups inaccordancerwith said single holes: analyzed, a second cam :portioncarried-"by said cam. disk, and means controllediby said second camportion and said print control magnet when energized a second time afterthe initiation of rotation of said cam disk for causing the actuation ofsaid clutch releasing means and said first named clutch to rotate saidprinting wheel to select said other group of type.

4. In a machine controlled by records of the type having holes atdifferent positions, a rotatable printing wheel carrying groups of type,a plurality of which groups are selected by single holes, and aplurality of other groups of type are selected by one of said holes andeither of two other holes, means for analyzing said records, a clutchadapted upon its engagement to rotate said printing wheel, means forreleasing said clutch for engagement, a supplemental clutch forcontrolling said clutch releasing means, a cam disk rotated by saidsupplemental clutch, a print control magnet, means under control of saidanalyzing means for energizing said print control magnet a first timewhen one of said single holes is analyzed, and a second time when eitherof said other holes is analyzed, means under control of said printcontrol magnet when energized a first time to cause the engagement ofsaid supplemental clutch and initiation of the rotation of said camdisk, a first cam portion carried by said cam disk for actuating theclutch releasing means to cause engagement of said first named clutchand the rotation of the. printing wheel to select a group of type ofsaid plurality of groups in accordance with said single holes analyzed,second and third cam portions carried by said cam disk, and meanscontrolled by said second and third cam portions and said print controlmagnet when energized a second time after the initiation of rotation ofsaid cam disk for causing in accordance with either of said other twoholes analyzed the actuation of said clutch releasing means and saidfirst named clutch to rotate said printing wheel to select a relatedgroup of said plurality of other groups of type.

5.111 a record controlled machine, a printing wheel, having one group oftype selected by a first hole, and another of a plurality of groupsselected by either of two other holes with the first hole, a type groupselectingclutch for initiating rotation of said printing wheel to selectgroups of type, a rotatable cam disk having three cam portions eachadapted to cause engagement of said type groups selecting clutch atdifierent times as said cam disk is rotated and one of saidcani portionsbeing effective after the other two cam portions are effective, recordanalyzing means, means controlled by 'said analyzing means forinitiating the rotation of said cam disk upon analysis of the first holein the record to cause said one of the three cam portions to beeffective to engage said type group selecting clutch to select said onegroup of type, means to prevent either of the two other cam portionsfrom being effective before said one cam portion is efiective, andfurther means controlled by said record analyzing means upon analysis ofeither of said two other holes to disable said preventing means and tocause either of the other two cam portions in accordance with which oneof the other two holes is analyzed to be efiective to engage said typegroup selecting clutch to select one or the other of said plurality ofother groups of type.

6. In a machine controlled by records having 1-9 and O, X, R holes, aprinting wheel having one group of type selected by an 8 hole, andanother of'a plurality of groups by an 8 hole with' either a 3 or 4hole, a type group selecting clutch for initiating rotation ofsaidprinting wheel to select groups of type, a rotatable cam disk havingthree cam portions each adapted to cause engagement of said type groupselecting clutch at different times as said cam disk is rotated and oneof said cam portions being effective after the other two cam portionsare effective, record analyzing means, means controlled by saidanalyzing means for initiating the rotation of said cam disk uponanalysis of the 8 hole in the record to cause one of the three camportions to be effective to engage said type group selecting clutch toselect said one group of type, means to prevent either of the two othercam portions from being efiective before said first one cam portion iseffective, further means controlled by said record analyzing means uponanalysis of either a 3 or 4 hole in the record to disable saidpreventing means and to cause either of the other two cam portions inaccordance with a 3 or 4 hole to be effective to engage said type groupselecting clutch to select one or the other of said plurality of groupsof type; means to take an imprint from the type on said printing wheel,means controlled by said analyzing means upon analysis of the 0, X, Rholes to cause said imprinting means to efiect an imprint from theselected type of the selected group, and interlock means for preventingsaid means under control of said analyzing means from initiating therotation of said earn disk upon analysis of the 0, X, R holes, and forpreventing said analyzing means upon analysis of the 8, 3, or 4 holesfrom causing said imprinting means to effect an imprint from saidprinting wheel.

References Cited in the file of this patent UNITED STATES PATENTS2,157,035 Torkelson May 2, 1939 2,199,561; Fuller May 7, 1940 2,386,422Beattie Oct. 9, 1945 2,438,071 Page Mar. 16, 1948 2,602,394 Rabenda July8, 1952

